Abstract

The SAM (Sequential Access through Meta-data) system is being built as a distributed cache management and data access layer for the D0 experiment at Fermilab. The innovation of the project is the fully distributed architecture of the system which is designed to be deployable worldwide. It uses a central database for the meta-data and a hierarchy of CORBA servers for the actual data movement. SAM provides distributed disk caching, data routing and replication and therefore has components attractive to the Grid.